Mr McDonnell said: "Removing the winter fuel payments from millions of pensioners could leave thousands of the most vulnerable at even more risk this winter".
"Indeed I would. There have been calls made by a lot of responsible people on this who are very anxious that she was at the Home Office for all this time, presided over these cuts in police numbers and now saying we have a problem", he said.
"I think we're going to sort this out on Thursday with the General Election", said Mr Trickett.
Theresa May remains voters' preferred choice for prime minister although her personal rating is down six points on 50%.
Seven people were killed when terrorists attacked the London Bridge area of the city on Saturday night, June 3.
May, who won the top job in the political chaos following the shock June 23 Brexit vote, used a speech yesterday in northern England to pitch her vision of Brexit.
He previously called the Labour leader a "mutton-headed old mugwump" and, after Mr Corbyn linked United Kingdom foreign policy to terror attacks in Britain, Mr Johnson called the Labour leader "monstrous", despite making a similar link himself in the past.
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Asked about suggestions that the nuclear deterrent could not work if Mr Corbyn would not order a first strike, Mr Gwynne told the Press Association: " I disagree with that, I think that if people know that you will always defend your country, you might not use the first strike, but you would be prepared to use those weapons because you've got those weapons, and I think that is the situation. "If we are to make the most of that opportunity, then we need the right economic policies and it makes me shudder to think that we could be seriously about to elect" a Labour-led government.
Last week Jim Messina, a former White House deputy chief of staff who joined the Tory campaign in April, hit back at YouGov research that suggested May could lose 20 seats - and her majority.
Government figures show the number of police officers has fallen from 146,030 officers in 2010 to 126,766 in 2016, while the number of armed officers has dropped from 6,976 to 5,639 in the same time.
Mr Corbyn also denied he had ever opposed the police having a "shoot-to-kill" policy when dealing with terror attacks, pointing out that an internal BBC investigation of an interview in which he discussed the issue in 2015 had found the report to be inaccurate.
But by focusing much of her Conservative party's campaign on her rival Jeremy Corbyn's security credentials, she has faced accusations of politicising the attacks.
"We are on the level", he says.
"Violence can never be allowed to disrupt the democratic process", May said outside her Downing Street office on Sunday, where British flags flew at half-staff.